| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a portable device capable of maintaining the transmission and reception state of a radio signal at a high level regardless of the presence or absence of the storage of a mechanical key. <P>SOLUTION: The portable device includes a transmission circuit 1s for transmitting or a reception circuit for receiving a radio signal via an antenna 1a, and stores the mechanical key for emergency in a storage section so that the mechanical key can be taken out. The portable device includes: a push switch SW2 for detecting the presence or absence of the storage of the mechanical key into the storage section; and a portable device side control unit CPU 1c that is connected to the push switch SW2 electrically, controls the transmission circuit 1s or the reception circuit according to the presence or absence of the storage of the mechanical key, and corrects the transmission or reception efficiency of the antenna 1a. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
